The film will be based on "The Sanitary Man of Sacred Land", a short story from Twinkle Khanna's book, The Legend of Lakshmi Prasad, which is inspired from the life of Arunachalam Muruganantham, a Tamil Nadu-based social activist who revolutionized the concept of menstrual hygiene in rural India by creating a low-cost sanitary napkins machine. Padman revolves around the story of Arunachalam who invented low-cost sanitary pads